Multifunctional mathematical drawing measuring ruler

Waveline scale for easy reading
The rounded design is not easy to hurt hands
High transparency is not easily obscured
High transparency, clear and visible lines
Increase the clarity and clarity of digital reading
Increase numbers every 5cm
Acrylic material is not easy to adhere to rubber
Rubber is not easy to stick and is easy to use
15cm is just a straight edge with waves
15cm for easy carrying and easy marking with waves